Amiga.org
Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: orange on July 12, 2004, 09:38:42 AM
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In some other thread, I read this:
"Especially the horizontal freq is important for Amiga-usage. I have a scandoubler for the vertical frequency of the Amiga, but the 50Hz remain. (Most TFTs start at 56Hz!)"
Can LCD monitor with these frequencies:
Horiz. Rate (Analog) 30-81
Horiz. Rate (Digital) 30-63
Vertical Rate 56-75
Bandwidth 135
work with Picasso IV in both 1280x1024 and scandoubled Amiga
modes like early startup screen?
:-?
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The Picasso IV is the rolls royce of all Amiga flickerfixers.. You can configure it to double the vertical frequency between 50 and 120Hz.
I have a scandoubler for the vertical frequency of the Amiga, but the 50Hz remain.
Note, that you were talking about vertical frequency when you meant horizontal. The scandoubler doubles the horizontal scan rate from around 15kHz to about 31kHz.
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If it do go as low as 30Khz then 31.5Khz (doubled 15.75Khz) should be no problem... thing is some of these monitors start at 32Khz and blindly ignore 31.5... for the Picasso screenmodes itself it should work without any hickups.
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Hi orange,
should be enough, to gain the Vert freq. of your programmable PIV SD/FF, to 60 Hz (or more).
Ciao
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But would he be able to display PAL modes on that screen? As I understand it you can either run PAL in 50Hz or with the PIV scandoubler in 100Hz, but from the specs of the monitor it says it can handle from 56-75Hz? Or did I get it all wrong?
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You got it wrong... 50Hz is Vertical... but as some owners here say the picasso can up that to 60Hz so it's in the 56-75Hz window of your monitor (Don't own one so can't confirm this though).
The Scandoubling thing is the horizontal and on stadnard Amiga this is 15.75Khz but with scandoubler it gets up to 31.5Khz so it too get in the 30-81Khz window of your monitor.
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Wow, you are fast !
I really don't know much about Picasso IV, so before taking it to shop to test it with LCD, how do I configure it (if that is needed)
Thanks all for replies.
:-)
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Brian wrote:
... but as some owners here say the picasso can up that to 60Hz so it's in the 56-75Hz window of your monitor
Well, yes, but I always though that it showed NTSC at 60Hz or 120Hz and PAL at either 50Hz or 100Hz ?
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> Well, yes, but I always though that it showed NTSC at 60Hz or 120Hz and PAL at either 50Hz or 100Hz ?
No, you can freely edit them upto about 160 Hz. And exact 100/120 Hz is about impossible.
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orange wrote:
I really don't know much about Picasso IV, so before taking it to shop to test it with LCD, how do I configure it (if that is needed)
Try holding down left SHIFT before boot. You should get the PicassoIV early-startup menu. You can configure the ff-frequency through that.
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No, you just can reset to default/use your preconfigured.
You need Picasso96ModeTNG to tweak the FliFi cfg.
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..oops; PicassoModeTNG.
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Thanks for that left Shift tip.
Excuse me for being ignorant, what is PicassoModeTNG?
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orange wrote:
Thanks for that left Shift tip.
Excuse me for being ignorant, what is PicassoModeTNG?
A piece of software for tweaking Picasso96 display modes.
It is also able to tweak the flickerfixer modes and save them to the card's flash..
100Hz PAL modes, wahahay!
I think TNG needs a working P96 installation, however. I run CGX4 and haven't been able to change my flickerfixer from the 80Hz someone else set it to. :-(
I guess I'll have to install P96 again for a while..
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Hi fx
usually a scandoubler, doubles ONLY the Horyzontal rate to ~31.250 Hz for PAL (15.625*2) and ~31.500 Hz for NTSC (15.750*2) without touch the Vertical rate (50 for PAL and 60 for NTSC).
With a programmable FlickerFixer (like the PIV one), you may choose the Vertical rate from 50 to 120 Hz.
So, for those monitor, should be enough, to choose a rate from ~60 Hz to 75 Hz (better) for the Vertcal scan rate.
Ciao
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I have PAL ca. @100Hz and NTSC ca. @120Hz. Steady at least.
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erm . . .OK and i'm happy for you :-) but if you read the topic, those monitor doesn't support more than 75 Hz v-rate.
Bye
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Do note this:
Even if you reconfigure the flickerfixer to 60 Hz (or something else) to make PAL/NTSC work on your LCD, you still won't be able to see the early startup menu (because the P-IV hasn't initialized yet).
I'm speaking from personal experience here....
Get a LCD that works with no tweaking of the flickerfixer, that would be the best.
-Paul
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Hi PaSha,
mhhh . . right. So the best solution, should be a LCD that supports 120 Hz . . .is it right?
Ciao
EDIT-like this LG (http://www.google.it/url?sa=U&start=10&q=http://www.mindlogic.com/MONIT_LGEL_885le_DTL.shtml&e=7764)
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EDIT-like this LG
The response time on that one is horrible.. No good for movies or games.. But for DTP stuff it would be ok..
Price is something else, I think it's to expensive..
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Hi orange,
work with Picasso IV in both 1280x1024 and scandoubled Amiga
Why would you want a screen resolution of 1280 X 1024? Are you planning to buy a 21" or LARGER monitor? Below I have listed the maximum screen resolution for each size monitor:
15" monitor 640 X 480
17" monitor 800 X 600
19" monitor 1024 X 768
21" monitor 1280 X 1024
So, now you see why I asked the above question. :-o
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What crap. There is no such "maximum" resolution, especially that low, for those monitor sizes.
Most 17" monitors have sufficient dot-pitch to display a 1024x768 screen without problems, and some of the more expensive ones can do 1280x1024 AND have the sufficient dot-pitch.
As for an LCD screen, you'd be hard pressed to find a 17" TFT that wasn't 1280x1024.
Where do you get your stupidity from? You could sell it, if only it wasn't so priceless.
Neko
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15" monitor 640 X 480
Care to explain why my 15" TFT is running 1024*768 then ?
Also check the link provided a few post up.. most 17" & 18" TFT do 1280*1024 native these days.
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Where do you get your stupidity from? You could sell it, if only it wasn't so priceless.
Never ask Doomy such a question...
Then again, I guess it's comedy hour now.. :-D :lol:
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1024X768 works fine on my old standard 15" monitor :-)
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Hi Neko,
What I should have said was that those are the highest screen resolutions that you can use for each screen size and still be able to read the text and see the icons. Sure you can change them to a much higher resolution, but it will look like crap! Have you ever wondered why the standard screen resolution for the internet is 800 X 600?
Neko, do not call me stupid. Just because you do not agree with me does not mean that I am stupid. In fact, it may just mean that I do know what I am talking about.
I have tried setting my ViewSonic 17" monitor on my PC to 1024 X 768 resolution. It looked like crap. The text and icons were too small. Also, most of my programs prefer 800 X 600. So, every time I would launch a program, I would here the relays in the monitor click to change the screen resolution. Why should I put my monitor through this unnecessary wear and tear, when I could just leave the monitor set at 800 X 600 to begin with?
Keep in mind that I NEVER have hardware related problems with any of my many computers, but you guys do have problems. So, what does common sense tell you about that? It tells me that the person that NEVER has hardware related problems MUST KNOW WHAT HE IS DOING AND IS NOT STUPID AFTERALL !!!! :-D
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@Doomy
You're describing your personal prefences.
I won't go into your internet resolution is 800*600 madness for obvious reasons.
You still got it Doomy, you still got it.. :-o
[edit]
Keep in mind that I NEVER have hardware related problems with any of my many computers, but you guys do have problems.
Yeah.. Right.. I'm still running the same Windows XP install since XP was released... Still works fine here never had any HW problems with it. My A500 is doing fine as well, thanks for asking, not to mention all the other PC's I have under maintenance (sp?).. Only a close to 800 PC's now..
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Pardon me Mr. Doomy :-) Maybe you're just lucky!
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@BoingBoss
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Keep in mind that I NEVER have hardware related problems with any of my many computers, but you guys do have problems. So, what does common sense tell you about that? It tells me that the person that NEVER has hardware related problems MUST KNOW WHAT HE IS DOING AND IS NOT STUPID AFTERALL !!!!
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Does that actually mean that we´re all stupid?
Well, now, where is your special-made-for-you version of the Hyperions AMIGA OS4 for your Amiga 2000 040 CPU? :-D :-D :-D :-D
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Hi,
sorry for starting all this fuss.
This is a bit offtopic:
after some surfing, I found this model interesting: Samsung 173p.
Its very expensive, but has good specs (700:1, 178/178!). The only trouble is that it is buttonless, needs software for changing brightness and other parameters.
There is a "catch", it can automatically adjust screen. So maybe I could start Deluxe Paint, make totaly black picture and then make it auto adjustment to get brighter (darker?) image for work?
Can you reccomend me some better TFT monitor for Picasso IV?
(preferably 17")
Most of the TFTs say that lowest resolution is 640x480, can thay display Amigas 320x256 at all?
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Even if you reconfigure the flickerfixer to 60 Hz (or something else) to make PAL/NTSC work on your LCD, you still won't be able to see the early startup menu (because the P-IV hasn't initialized yet).
I'm speaking from personal experience here....
It will come in from the early startup menu. Speaking from personal experience here.
I played around with this this morning, and it seems that I can't set PAL to less than 55Hz and NTSC to less than 64Hz. Anything less goes to some crazy 100-300Hz mode, that my TFT can't display. :-)
(yes, the best refresh rates it gave me were around 300Hz according to the TFT's OSD)